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Image Number K10345-1 Geneticist George Vandemark isolates DNA from a bean plant that will be examined with a polymerase chain reaction assay to determine whether it has the virus-resistant gene. The assay can be completed in 1 day, whereas greenhouse methods require up to 4 months to determine the same thing. Photo by Stephen Ausmus.  640 pixels wide: (k10345-1.jpg)   Please visit our Image Gallery


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